Maybe it's that I'm old fashioned or maybe it's my particular choice of religion, but I feel strongly that a man has a responsibility to provide for his family as best he can. Doesn't mean he has to provide a mansion and a yacht, but he does have a responsibility to provide food, shelter, clothing, etc. I feel this should be taken into account regardless of whatever activities you're engaging in be that driving to work, walking down a street or scuba diving. I also believe your responsibility extends to when you're gone. Don't assume you'll be the last to go. Personally, I have insurance, investments and home equity that is more than sufficient to provide for my wife and my two daughters (17 and 20) if I were to die regardless of how.
With that said, I happen to also love my wife and daughters a great deal and want nothing more than to grow old enjoying their company. Therefore, while I enjoy active hobbies like scuba, running and hiking, I also do everything I can to do them safely. With regard to scuba that means using the appropriate equipment for the type of diving that I do, participating in the training required to dive safely and diving conservatively, well within my limits.